Technical specifications
TW-Turb-40 / TW Turb-W40
TW Turb-40 | TW Turb-W40 | |
|---|---|---|
Application | Drinking water, groundwater and surface water | |
Measurement technology - | IR LED 860 nm, FWHM* 30 nm | White light LED (color temperature between 2200-3000 °K) |
Measurement technology - | IR photodiode with a spectral peak response at 860 nm | Photodiode with a spectral peak response in the range between 400 and 600 nm |
Measuring principle | Nephelometry | |
Parameters | Turbidity in FNU or NTU | Turbidity in NTU |
Applied standard | DIN EN ISO 7027-1:2016-11 | EPA Method 180.1 (August 1993) |
- *
Full Width at Half Maximum (= half value width)
TW Turb-40 | TW Turb-W40 | |
|---|---|---|
Measuring range | 0-40 FNU | 0-40 NTU |
Measuring accuracy | ± (5 % + 0.01) FNU | ± (5 % + 0.01) NTU |
Resolution | 0.002 FNU | 0.002 NTU |
Sensitivity | 0.005 FNU | 0.005 NTU |
Repeatability | ± (0.5 % + detection limit) | tbd |
Detection limit | 0.01 FNU | 0.01 NTU |
TW Turb-40 | TW Turb-W40 | ||
|---|---|---|---|
Linearity / | ≤ 0.53 % | tbd | |
Measurement deviation | ≤ (2 % of the measured value + detection limit) | tbd | |
Reproducibility | ≤ (1 % of the measured value + detection limit) | tbd | |
Response time (T90) | sensor | 20 s (only for the sensor) | |
entire system | 90 s at a flow rate of 10 L/h | ||
Warm-up time | 60 s | ||
TW Turb-40 | TW Turb-W40 | |
|---|---|---|
Data logger | Internal 8 GB memory, smallest storage interval 5 s | |
Response time | 20 s | |
Smallest measurement interval | 3.1 s | |
Cross sensitivities | Finely dispersed air bubbles | Colored solutions, finely dispersed air bubbles |
Display | 3.5 inch capacitive color touch display, 320x480 pixels |
|---|---|
Interface - digital | RS-485 (Modbus RTU), Ethernet (Modbus TCP) |
Interface - analog | - |
Power supply | 12-24 VDC (± 10 %) |
Power consumption | Typically 2 W; standby: 1.5 W |
Connection | M12 hybrid industrial connector, 8-pin |
Housing material - flow cell | POM / NBR | |
|---|---|---|
Housing material - sensor | Aluminum / POM / PET / quartz glass | |
Dimensions (W/H/D) | 160 / 280 / 108 mm | 6,3 '' / 11 '' / 4.25 '' |
Weight | Approx. 3.8 kg | approx. 8.4 lbs |
Operating conditions | ||
|---|---|---|
Operating temperature | Sample (insitu) 0...40 °C | 32...104 °F |
Ambient temperature | 0...40 °C | 32...104 °F |
Min. Internal pressure | 0.2 bar | 2.9 psi |
Max. internal pressure | 1 bar | 14.5 psi |
Flow rate | Min. 6 L/h (0.1 L/min) | |
|---|---|---|
Recommended 30 L/h (0.5 L/min) | ||
Max. 1200 L/h (20 L/min) | ||
Internal volume | Approx. 150 mL | |
Transport conditions | 0...80 °C | 32...176 °F |
Storage conditions | 0...80 °C | 32...176 °F |
Protection class | IP30 | |
Maintenance effort | Depending on the water quality, typically < 0.5 h / month |
|---|---|
Calibration/maintenance | Depending on water quality (typically every 12 months), regular cleaning depending on water quality |
System compatibility | TW Master, Modbus RTU, Modbus TCP |
Warranty period | 1 year (EU & USA: 2 years) |